Side bearing for cars.



1,273,866. {fag} G. A. JOHNSONIk l SIDE BEARING Foal GARS.

LICATIO FILED N .2 91

Patented July 30, 1918.

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GEORGE A. .IoHNsoN, or CHICAGO, ILLINOIS, AssIGNon To WILLIAM II. Munn, oF l GHAZY, NEW YORK.

` SIDE BEARING Fon CARS.

specmeation of Letters raient.

Patented aulygao, 1918.

i Application filed November 20,1916. Serial No. 132,312.

To all whomt may concern:y Y

Be it known that I, GEORGE ,AfJoHNsorn a citizen of the United States, residing Yat Chicago, in the vcounty ofGook and State of Illinois, have invented aA certainV new and useful Improvement in Side Bearings for Cars, of which the following is a full, clear,

concise and exact description, reference being khad to the accompanying drawings, p

forming a part ofl this specification.

This invention relates to improvements in side bearings for cars.

The object of the invention is to provide an anti-friction side bearing for railway cars so arranged that a uniform distance will always be maintained between the holsters during the relative rotating movements and having the anti-friction roller adapted t0 return to normal position under the inuence of gravity.

In the drawing forming a part of this specification, Figure 1 is an end elevation of portions of a body and truck bolster of a car.

showing my Improvements in connection therewith. Fig. 2 is an enlarged vertical sectional view taken substantially on the line 2-2 of Fig. 1 and showing the parts in normal position. Fig. 3 is a view similar to Fig. 2, but illustrating the position of the parts at the end of a movement. And Fig'. 4 is a sectional view taken substantially on the line 4 4 of Fig. 2. In said drawing, 10 denotes a body bolster of a car and 11 a truck bolster pivotally connected thereto. The body bolster is shown as provided with an integral bearing surface 12 with depending anges 13-13 at the sides thereof. Se-,

cured to the upper face of the truck bolster is a base casting 14 of box-like form and having a concave upper bearing surface 15.

The casting 14 is rovided with side flanges mally horizontal bearing surface 20 yand aI convex upper bearing surface 21 adaptedto engage said surface 12. The rocker 19 1s supported by means of a pin 22fwh`ich eX-l tends transversely through the Yrocker and through enlarged openings 23' in theside Y flanges 13. The pin`22 is prevented from displacement and also held in its uppermost -position by means of springs 24,-24 attached thereto and also to suitable eyes 25 on the under'surface of the bodyY bolsters.

The side flanges 16 ofthe base casting are recessed' as indicatedat 26S in order to permit dirt yor other foreign matter to passout and prevent clogging of the roller.

The curvature lofv the "surface 21 Vis soV designed with respect to the curvature of the surface 15 that, as the roller travels to either side of normal position during operation of the side bearing, the vertical distance between the line of contact of the roller 17 with the surface 15 and the line of contact of the surface 21 with the surface 12 will always remain the same. By this means, the spacing between the two holsters is maintained uniform during therelatively rotat- -ing movements. Normally, the rocker 19'is slightly spaced from the ,roller 17, but when the weight is transferred to the bolster 10 so as to bring the rocker 19 into engagement with the roller, the roller will be revolved and move to either side of its normal position as the body bolster and Vtruck bolster turn relatively to eachother. Due to the rocking movement of the member 19, it is apparent that the pin 22 will be forced downwardly within the venlarged openings 23 and against the action of the sprmgs 24. Upon release of the pressure on the side bearing, the pin 22 together with 'the rocker 19 will be lifted and the rocker centered as shown in Fig. 2. This .willeliminate the contact between the roller and the rocker thereby' permitting the latter to return to central or normal position under ther influence of gravity down the curved surface 15.

I claim: Y

1. In a side bearing, the combination with members havingl upperY and lower-bearing surfaces, of a roller mountedon the lower bearing surface and adapted to be returned to normal position by gravity, and a rocker in engagement with said upper bearing surface and against which the roller bears dur-,KY Y

ing operation.

2. In a roller side bearing, the combina-* tion with a lower .member havingacon#V cave upper bearing surface, of a roller mounted thereon, a second member having ,Y a plane bearing surface, a rocker havin an upper convex surface engaging sai horizont-al surface7 the rocker having a lower horizontal surface disposed above the roller and with which the latter is adapted to en gage.

3. In a side bearing, the combination with two Opposed members, one having a concave surface and the other a flat surface, and a rocker and a roller interposed between said surfaces, the roller engaging said concave surface and the rocker said plane surface.

4. In a side bearing for cars, thecombination with a base casting adapted to be secured to a truck bolster, said base casting having a concave bearing surface in its upper face, of a roller mounted yon said surface and adapted to be returned thereby to normal position under the infiuence of gravity, a rocker disposed above said roller, said rocker having a lower horizontal surface over the roller and a convex upper surface, and spring controlled means for supporting said rocker from a truck bolster, the curvature of said concave and convex surfaces being such that the distance between the line of contact of the roller with the concave surface and the convex surface of the rocker with the body bolster remains uniform during the actuation of the sid-e bearing.

In witness that I claim the foregoing I have hereunto subscribed my name this 16th day of Nov. 1916.

GEORGE A. JonNsoN.

Copies of this patent may b'e obtained for five 'cents each, by addressing the "Commissioner of Patents,

v Washington, D. C. 

